If an element has 2 valence electrons, how many dots will be in the elements dot diagram?

80% 1. Which model best describes the particles of a solid and their motion?

Nitrogen dioxide (NO2) gas and liquid water (H2O) react to form aqueous nitric acid (HNO3) and nitrogen monoxide (NO) gas. Suppose you have 5.0 mol of NO2 and 11.0 mol of H2O in a reactor. Suppose as much as possible of the NO2 reacts.

Which is a correct comparison between the modern quantum model and John Dalton's model of the atom? The modern model is not as widely accepted by scientists as Dalton's model.

Which of the following is true? A. The least reactive element in group 2 is the one with the largest atomic radium and the least amount of attraction between the nucleus and the valence electrons. B.

Properties that describe how matter reacts when exposed to other substances or energy

What is the mass number of an isotope

A sample of sodium reacts completely with 0.284 kg of chlorine, forming 468 g of sodium chloride. What mass of sodium reacted?

Is it true or false that gamma rays have no mass and no electrical charge

True or False? Urea has a high solutiblity in water, due in part to its ability to form hydrogen bonds

Give a reasonable explanation why segments 2 and 4 are not associated with temperature increases even though heat is added a constant rate.